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MEOHANIOAL MOVEMENT.

No. 399,746. Patented Mar, 19, 1889.

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MECHANICAL MOVEMENT.

Patente Mar. 19, 1889.

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MECHANICAL MOVEMENT.

Patented Mar. 19, 1889.

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DARIEN I V. DODSON, OF VVILKES-BARRE, PENNSYLVANIA, AND FRANCIS H. RICHARDS, OF SPRINGFIELD, MASSACHUSETTS; SAID RICHARDS ASSIGNOR TO SAID DODSON.

MECHANICAL MOVEMENT.

SPECIFICATION forming part of Letters Patent No. 399,746, dated March 19, 1889.

Application filed November 15, 1886. Serial No. 219,327. (No model.)

To all whom it may cmwern:

Be it known that we, DARIEN W. DODSON, of Wilkes-Barre, in the county of Luzerne, State of Pennsylvania, and FRANCIS I-I. RICH- ARDS, residing at Springfield, in the county of Hampden and State of Massachusetts, have invented certain new and useful Improvements in Mechanical Movements, of which the following is a specification.

This invention relates to mechanism for starting and stopping the revolution about its axis of a shaft or wheel having a continuous orbital movement, the object being to furnish an apparatus for so operating the type-wheels of a certain class of type-writing machines, and for imparting to such a wheel or shaft two revolutions each time started.

To this end the invention consists in certain improvements and combinations hereinafter set forth.

In the drawings accompanying and forming a part of this specification, Figure 1 is a plan view of a mechanical movement embodying our invention. Fig. 2 is a front sectional elevation of the same. Fig. 3 is a top view of the gearing, showing the type-shaft or segmental gear in four successive positions. Figs. 4, 5, and 6 are three similar elevations of the repeating apparatus. Figs. 7, 8, and 9 are respectively a top view,a front sectional elevation and a side elevation (all drawn to an enlarged scale) of the latch mechanism in its normal positionthat is, set ready for use. Figs. 10, 11, and 12 are three similar views of this mechanism at the moment after the latch has been unhooked. Figs. 13, let, and 15 are three similar views showing the parts as situated after the latch has been reset, but before the return of the tripping-rod. Figs. 16 and 17 are top and sectional elevations, respectively of a modification of a portion of the repeating mechanism. Fig. 18 illustrates one form of the gearing.

Similar characters designate like parts in all the figures.

Our improvements consist of a shaft-carrying frame or turret, constructed and arranged to be revolved about a fixed axis by means of an y suitable or convenient appliances, a shaft carried on said frame and usually furnished with a type-wheel, a latch mechanism for starting said shaft revolving about its own axis, gearing for continuing such movement, and a repeating apparatus for causing the revolution of the shaft to be repeated each time started. The frame-work for supporting these several portions of the mechanism may be the frame of some machine in which this mechanical movement may be incorporated, or it may consist of the parts shown in the drawings. These are base-plate B, circular wall C, post P, fixed stud D, and latch-frame F.

The shaft-carrying frame consists, or may consist, of a sleeve fitting freely on stud D, and two arms, of which the lower one is designated by 2 and the upper one by at, the frame whole being designated by H. Said arms have each a bearing for a revolving shaft, 5, and the lower arm has a stud, 6, on which turns the cam of the repeating apparatus. Frame II is or may be rotated on stud D by means of gear 7, fixed on said frame, which gear is driven by gear 8 on the driving-shaft 9.

Shaft 5 has fixed thereon for driving it a segmental gear, 10, whose teeth mesh with the internal teeth, 11, formed on or attached to wall C; a starting-arm, 12, for engaging with the latch to start said shaft rotating; a pinion, 13, for driving the repeating apparatus, and a stop-arm, 14, for bringing the shaft to rest after it has made the required number (usually two) of revolutions about its own axis. It also carries usually the type-wheel W, or some other part in lieu thereof.

Arm 12 has formed in the outer end thereof a socket, 15, for engagement with the proj ecting end of a latch, whereby said arm and its shaft are started rotating. Said latch or shaftstarter is an element of a latch mechanism described and claimed in a separate application, Serial No. 218,973, filed by one of the present applicants, and the construction and operation of which in its preferred form are as follows: The latch frame F is slotted or grooved to receive a sliding latch, 50, held in place by cap 51. The latch is thrown forward (toward the right hand in Figs. 7, 8, 10, 11,13, and 14) by spring 52, contained in the frame,

and which acts, through the sliding pin 53, against a projection, 54, formed on the latch, the motion of the latch being limited by a stop, 55, formed thereon and striking against said cap 51. The rear end of the latch has a spring, 56, terminating in a hook, 57, that normally engages with the notch or projection 58 on the frame, as shown in Figs. '7 and WVhen that hook is forced off from thenotch, as in Figs. 10, 11, and 12, spring 52 throws out the latch, as shown in these figures. For unhooking the latch there is provided a tripping-rod, (guided in frame F at 69,) whose upper end is capable of a movement in three di- I 5 rections, vertically, horizontally with the motion of the latch, and crosswise thereto. The tripping-rod consists in a flat rod or wire, 60, twisted at 62, so that the part 63 stands crosswise to part 64, this arrangement being for the purpose of rendering the wedge-shaped upper end, 65, yielding in two directions, one of which is shown in Fig. 12 and the otherin Fig. 1.4. The wedge 65 stands normally between hook 57 and incline 66, as in Figs. 7, 8, and 9. If, now, the tripping-rod be forced up, as in Figs. 10, 11, and 12, the incline forces off the wedge, and this acts against the hook to push it oif notch 58, thereby permitting the latch to be thrown forward, as shown in these .30 figures. The rod 60 may now be lowered, as in Fig. 9, and the latch rehooked in its former position; but as the frame H is or may be continuously revolving it is possible and even probable that the latch will be returned by arm 12 before the tripping-rod can be lowered; and to prevent this circumstance intefering with the rehooking of the latch said rod is constructed and arranged to be pressed back by the latch, (by hook 57 thereof,) as shown in Figs. 13 and 14. Bythis means the finger-key '70 is so connected with the latch that one stroke on the key (properly limited by stops 71 72) can produce but one move- 7 ment of the latch, cannot keep the latch unhooked, and thereby repeat the operations of the whole mechanism. This peculiar detachment between the key and latch we deem, as a matter of convenience, of the highest importance in this class of machines; but it is not, however, essential that the latch mechanism used in our newmechanical movement shall have such feature.

The segmental wheel or gear 10 has a sufficient number of teeth removed from one side thereof, (four being omitted' in this instance,) so that when carried around in its orbit by frame H, without being turned on its own axis, the terminal teeth 16 18 of the gear will pass without hitting the internal 6o gear or teeth, 11. This omission, however, is temporarily supplied by one or more movable teeth, 20, (two being shown in this instance,) which are brought into line with the other teeth of gear 10, and thrown out again at proper intervals by the repeating mechanism. Said teeth 20 are carried on a stem, 21, fixed to arm 22 of sleeve 23, which sleeve has two collars, 24, forming between them the annular groove 25. Pinion 13 meshes with and drives a gear, 26, on stud 6, which gear carries a cam, 27, whose rim works in said groove 25, and is supposed to be shaped for imparting to said sleeve at proper times a reciprocating movement on shaft 5, thereby actuating teeth 20, as above described. Said gear 26 should have a diameter which is equal to the diameter of the pinion multiplied by a whole number, as 2, 3, or 4. In this instance the gear is twice the diameter of the pinion, since the shaft 5 is required to make two turns at each operation. For detaining shaft 5 and the repeating mechanism in their normal position ready for starting, the gear 26 has in the under side thereof a detent-notch, 30, of the usual form, into which the detent-pin 31 is forced by spring 32, these two parts being contained in a suitably shaped and located hole in arm 2. This detent device (or some well-known equivalent therefor, including a friction-detent) serves to restrain the axial rotation of shaft 5, and to normally hold the respective parts in their positions. (Shown in Figs. 1, 2, and 4, and at position V, Fig. It is in practice immaterial whether the detent-notch be formed in gear 26 or in the gear 13, or in some other part on shaft 5, and in the claims we regard all such arrangements as equivalents for each other.

The stop-arm 14 is provided to forcibly stop shaft 5 at the end of the second revolution about its own axis. For this purpose the outer end of said arm. is bent downward to form the stop-pin 35, which pin strikes against the inside (or outside, if suitably arranged) of a segmental rim, 36, which rim is located orbitally forward from the startinglatch a distance greater than one and less than two revolutions ofgear 10. At the same time that said stop-arm is thus intercepted by the rim the detent-pin enters notch 30. The stop-arm and rim do the work of stopping the shaft, after which the detent holds it stopped until the starting-arm again strikes the latch.

As shown in the drawings, the gear 10 runs within the internal gear, (or stationary continuous rack,) whose teeth are designated by 11.; but this arrangement may obviously be reversed and said gear 10 be arranged to run outside of a spur-wheel having teeth similar to teeth 11. The arrangement shown has been adopted in preference to the other, because that in this case the required number of turns of shaft 5 may be obtained with a less rotary movement of frame 11, the radius of orbit 40, Fig. 3, of said shaft being the same in each case.

The particular construction and arrangement of the repeating mechanism may be modified in several respects. For instance, one of the collars 24 may be omitted and a spring be used to slide sleeve 23 in one direction against the cam. The cam may actuate said sleeve through the intervention of a lever or other connection, and it may be placed on shaft 5, below the sleeve, and driven at a reduced speed by the system of gearing commonly used 011 lathes and known as backgearing. The operation of teeth 20 may also be changed, so that they will move radially, instead of axially, to shaft 5, as shown in Figs. 16 and 17. Here said teeth are shown projecting from the slide 37, which part is fitted to slide radially in gear 10. Arm 22 has fixed thereon an inclined bar, 38, which fits a corresponding perforation in said slide, so that avertical movement of said arm and bar imparts to said teeth the required radial movement at right angles to the movement of the arm.

The essential thing to be done, whatever form of the gear-tooth-actuating apparatus may be preferred, is to temporarily interpose the tooth 20 or its equivalent into the plane of the stationary gear or rack, so that for the time being said gear 10 will operate as a complete spur-wheel and at other times as a segmental wheel.

Our invention is not to be limited to the use of spur-gearing, for the teeth 11 and the teeth 16,17, and 18 on gear 10 may all be replaced by corresponding frictional surfaces; and throughout this specification we use the terms gear and gearing, or the like, as comprising both the toothed and the frictional varieties.

In Fig. 18 the rim 11 is a substitute for gear 11, Fig. 3, and the gear 10 is set to turn in frictional contact therewith. Slide 37 in this case has a curved end or are, 39, which, when the slide is moved out, coincides with the circuit orperiphery of said wheel or gear 10, and which is the equivalent of the tooth or teeth 20 in the other figures.

The operation of our improved mechanical movement, and especially of the details thereof, will have been understood from the drawings and the preceding description. \Vhen the operator wishes to cause wheel V to turn on its axis, he touches one of the keys 70, thereby throwing out a latch, 50, as at V, Fig. 5. The latch engaging with arm 12 on shaft 5 turns said parts (and is itself returned) until tooth 16 of gear 10 meshes with teeth 11, as at X, after which said gear continues to be driven by the said internal stationary teeth until the last tooth, 18, passes out of mesh. In the meantime, however, the repeating mechanism has been operating to interpose teeth 20 in the circuit of the other teeth of gear 10, so that said teeth .30 shall mesh with teeth 11, as at Y, and thus serve to begin the second revolution of said gear 10. During the second revolution said mechanism acts to throw said teeth 20 out of line preparatory to the stopping of shaft 5. This is done time. speeds.

usually efficient for the purpose, if the spring 32 is sufficiently strong.

It should be understood that this mechanical movement, and especially the several details thereof, are capable of modification in Various ways and degrees, (other than the ways described,) after the manner of machines in general, within the scope and limits of our invention.

Having thus described our invention, we claim 7 1. The combination, with a revoluble shaft having an orbital movement, and having thereon a startingarm and a segmental gear, of a latch interposable in the path of said arm for starting said shaft, and a repeating mechanism actuating a tooth or are of gear interposable in the circuit of said gear, all substantially as and for the purpose described.

2. The combination of the revoluble shaft having thereon the gear 10, the stationary gear having teeth 11, tooth or teeth 20, constructed to have a reciprocating movement, a cam driven slower than shaft 5, and connections actuating said tooth or teeth from the cam, all substantially as described.

3. The combination, with shaft 5, having the segmental gear 10, of sleeve 23, carrying one or more teeth, 20, and cam 27, driven from said shaft and operatively connected with said sleeve, substantially as described.

a. The combination, with a revoluble shaft having an orbital movement and having thereon the stop-arm, of a segmental rim intercepting the movement of said arm, all substantially as described.

5. The combination, with a revoluble shaft having an orbital movement and having thereon a starting-arm and a stop-arm, of a latch interposable in the path of said startingarm for starting said shaft, and a segmental rim intercepting the movement of said stoparm, all substantially as described.

6. The combination, with a revoluble shaft having an orbital movement and having thereon a starting-arm and a stop-arm, of a latch operating on said starting-arm to start said shaft, a segmental rim for intercepting said stop-arm to stop said shaft, and a detent operating to restrain the axial rotation of said shaft, all substantially as described.

'7. The combination, with a revoluble shaft having an orbital movement and having thereon a segmental gear, of a repeating mechanism actuating a tooth or are of gear interposable in the circuit of said gear, all substantially as described.

8. The combination, with a revoluble shaft having an orbital movement and having thereon a starting-arm, ofnieans (as a shaftstarter) for starting said shaft revolving, and gearing, substantially as described, for continuing the said movement through two revolutions each time the shaft is started, all substantially as described.

9. The combination, with a revoluble shaft having an orbital movement, of a stationary gear concentric to said shafts orbit, a segmental gear fixed and arranged on said shaft to run in mesh with said stationary gear, and having a tooth normally out of the plane of the stationary gear, and a cam moving simultaneously With said shaft and actuating said tooth to throw the same into mesh with said stationary gear, whereby said shaft is revolved twice each time it is started, substantially as described.

10. The combination, with a revoluble shaft having an orbital movement and having thereon a starting-arm, of a latch interposable in the path of said arm for starting said shaft, a

stationary gear concentric to said shafts orbit, a segmental gear fixed and arranged on said shaft to run in mesh with said stationary gear and having a tooth normally out of the plane of the stationary gear, and a cam moving simultaneously with said shaft and actuating said tooth to throw the same into mesh with said stationary gear, whereby said shaft is revolved twice each time it is started, substantially as described.

DARIEN XV. DODSON. FRANCIS H. RICHARDS. Witnesses:

FRANK H. PIERPONT, WILBUR M. SToNE. 

